Apprentice
Stuck for a gift for your grandparents this Christmas? Look no further than the human airbag.

Not intended for busy people speeding through the city streets, but for old age pensioners afraid of taking a tumble. This strap on pouch is a cutting edge human airbag that deploys in seconds if it detects the wearer has fallen. Three football sized airbags inflate as they are pumped full of compressed gas, protecting the back of the head and vulnerable behind.

Developed by Japanese company Prop, the device costs $1000. Consider that Japan has almost 30 million people over the age of 65, and it's an awesome business innovation. There is a huge market for products to protect and assist seniors, and this is just one of many.